The 2024–25 European Aquatics Women's Challenger Cup is the 2nd edition of the water polo competition organised by European Aquatics. It acted as the third tier, below the European Aquatics Women's Champions League and the European Aquatics Women's Euro Cup. Izmir BSB Spor are the defending champions. This is the last season where the Challenger Cup is the third tier tournament in European water polo, with the Conference Cup taking its place. Izmir BSB Spor successfully defended their title after triumphing over fellow Turkish side Galatasaray Zena in the final. Format. 17 teams are separated into four groups of four or five. Each group is held at one club. The top 2 from each group advance to Qualification round II. The last eight teams are then drawn into two groups of four, with the top two from both groups advancing to the final four to decide the champion. Rankings. Only teams below the top 6 can enter the competition. Teams. Only countries below the top 6 in the European Aquatics women's club rankings can enter teams into this competition. Qualification round I. In the qualification round I, teams play in a round robin format. The top 2 in each group advance. Draw. The draw was on 16 September 2024. H indicates which club is hosting the groups. Teams in bold advanced to the next round. The seeding was decided by as follows: Group A. Held in Novi Sad, Serbia Group B. Held in Valletta, Malta Group C. Held in Strakonice, Czech Republic Group D. Held in Alba Iulia, Romania Qualification round II. In the qualification round II, teams play in a round robin format. The top 2 in each group advance to the final four. Draw. The draw was on 11 November 2024. The seeded and unseeded clubs consist of the teams that finished first and second in the previous round respectively. The only restriction was that clubs from the same group in the previous round could not be drawn against each other. H indicates which club is hosting the groups. Teams in bold advanced to the final four. Group A. Held in Istanbul, Turkey Group B. Held in Vojvodina, Serbia Final four. On 18 January 2025, European Aquatics announced that Galatasaray Zena would be the hosting club for the final four. The final was at the Istanbul Metropolitan Municipality Cemal Kamaci Sports Complex in Istanbul.